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Which statement about the Cisco MPLS Traffic Engineering class-based tunnel selection （CBTS） is nottrue？（）
A . Local mechanism is at the middle-point router.
B . EXP selection is between multiple tunnels to the same destination
C . Bundle members are configured with EXP values to carry.
D . The tunnel selection is configured on the tunnel master.
E . The tunnel master bundles the tunnel member
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Which of the following router models will support 1000 tunnels？（）
A . 2811
B . 2801
C . 2851
D . 2821
E . 1841
F . 3825
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Which two tunneling techniques support IPv6 multicasting？（）
A . 6to4
B . 6over4
C . ISATAP
D . 6PE
E . GRE
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EAP-FAST provides a secure tunnel during Phase One to protect the user’s authentication credentials. Which of these entities initializes the secure tunnel？（）
A . generic token card
B . x.509 certificate
C . preshared key
D . Protected Access Credential
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Which router or router combination is used to calculate the MPLS traffic engineering tunnel path？（）
A . head-end router and tail-end router
B . middle-point router
C . head-end router
D . tart-end router
E . tail-end router
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You need to configure a GRE tunnel on a IPSec router. When you are using the SDM to configurea GRE tunnel over IPsec， which two parameters are required when defining the tunnel interfaceinformation？（）
A . The crypto ACL number
B . The IPSEC mode （tunnel or transport）
C . The GRE tunnel interface IP address
D . The GRE tunnel source interface or IP address， and tunnel destination IP address
E . The MTU size of the GRE tunnel interface
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Which two of the following are designated fields for MAC tunneling protocol（802.1 ah）？（）
A . Service Ethertype
B . ISL
C . PseudoLAN TAG
D . 802.1q VLAN TAG
E . Control Word
F . Tunnel Label
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Eap-fast provides a secure tunnel during phase one to protect the user’s authentication credentials. Which of these entities initializes the secure tunnel？（）
A . x.509 certificate
B . generic token card
C . pre shared key
D . protected access credential
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Which two tunneling techniques support IPv6 multicasting？ （）
A . 6to4
B . 6over4
C . ISATAP
D . 6PE
E . GRE
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EAP-FAST provides a secure tunnel during Phase One to protect the user’s authenticationcredentials. Which of these entities initializes the secure tunnel？（）
A . x.509 certificate
B . generic token card
C . preshared key
D . Protected Access Credential
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A company is using 6to4 tunneling within their IPv6 network. Which two statements about this kindof tunneling are accurate？（）
A . 6to4 is a manual tunnel method
B . Prepending a reserved IPv6 code to the hexadecimal representation of 192.168.0.1 facilitates6to4 tunneling
C . Each 6to4 site receives a /48 prefix in a 6to4 tunnel
D . 2002：：/48 is the address range specifically assigned to 6to4
E . Prepending 0x2002 with the IPv4 address creates an IPv6 address that is used in 6to4tunneling
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A Company is using 6to4 tunnels in their IPv6 network. Which two statements are true about thesetunnels？（）
A . In a 6to4 tunnel， the first two bytes of the IPv6 address will be 0x2002 and the next four byteswill be the hexadecimal equivalent of the IPv4 address
B . In a 6to4 tunnel， the IPv4 address 192.168.99.1 would be converted to the2002：1315：4463：1：：/64 IPv6 address
C . In a 6to4 tunnel， the IPv4 address 192.168.99.1 would be converted to the 2002：c0a8：6301：：/48IPv6 address
D . In a 6to4 tunnel， the first two bytes of the IPv6 address will be locally derived and the next twobytes will be the hexadecimal equivalent of the IPv4 address
E . In a 6to4 tunnel， the IPv4 address 192.168.99.1 would be converted to the 2002：c0a8：6301：：/16IPv6 addre
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Which two mechanisms can be used to detect IPsec GRE tunnel failures？（）
A . Dead Peer Detection （DPD）
B . CDP
C . isakmp keepalives
D . GRE keepalive mechanism
E . The hello mechanism of the routing protocol across the IPsec tunnel
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Which two steps below should you perform on the hub router while configuring EIGRP routing over DMVPN （mGRE tunnel）？ （）
A . Set the NHRP hold time to match the EIGRP hold time
B . Add the enable eigrp stub command
C . Add the disable eigrp as-member split-horizon command
D . Add the disable eigrp as-member next-hop-self command
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Which of these statements best describes the major difference between an IPv4-compatible tunnel and a 6to4 tunnel？（）
A . An IPv4-compatible tunnel is a static tunnel， but an 6to4 tunnel is a semiautomatic tunnel.
B . The deployment of a IPv4-compatible tunnel requires a special code on the edge routers， but a 6to4 tunnel does not require any special code.
C . An IPv4-compatible tunnel is typically used only between two IPv6 domains， but a 6to4 tunnel is used to connect to connect two or more IPv6 domains.
D . For an IPv4-compatible tunnel， the ISP assigns only IPv4 addresses for each domain， but for a 6to4 tunnel， the ISP assigns only IPv6 addresses for each domain.
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Which of the following IPv6 tunneling mechanisms support IPv6 IGP routing protocols?（）
A . Automatic 6to4
B . Manually configured tunnel
C . ISATAP
D . GRE
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Which statement about MPLS traffic engineering policy-based tunnel selection （PBTS） is not true？（）
A . The tunnel that is not configured with the policy-class command acts as the default
B . EXP selection is between multiple tunnels to the same destination
C . There is no requirement for IGP extensions
D . Tunnels are configured using the policy-class command and carry multiple EXP values
E . It supports VRF traffic， IP-to-MPLS switching， and MPLS-to-MPLS switching
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The answers each list a tunnel method and two consecutive IPv6 address quartets.Which answers identify a tunneling method that relies on an IPv4 address to be embedded into an IPv6 address, within the correct quartets listed?（）
A . Automatic 6to4, quartets 2 and 3
B . Automatic 6to4, quartets 7 and 8
C . ISATAP, quartets 2 and 3
D . ISATAP, quartets 7 and 8
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Which methods would enable traffic to be forwarded along an MPLS TE tunnel？（）
A . MP-BGP routing
B . Static routing
C . Policy routing
D . Autoroute
E . Forwarding adjacency
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Which statements are correct for forwarding traffic into MPLS TE tunnels？（）
A . Autoroute causes the tunnel to be treated as a directly connected link to the head-end.
B . Autoroute causes the TE head-end to establish IGP adjacency with the tail-end over the tunnel.
C . Forwarding adjacency makes the TE head-end node advertise the Tunnel LSP into the IGP.
D . Forwarding adjacency supports unequal cost load balancing over multiple TE tunnels.
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Which statement is true concerning 6to4 tunneling?（）
A . The edge routers can use any locally configured IPv6 address.
B . Hosts and routers inside a 6to4 site will need a special code.
C . An edge router must use IPv6 address of 2002::/16 in its prefix.
D . IPv4 traffic is encapsulated with an IPv6 header.
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In IPv6 network, an IPv6 overlay tunnel is required to communicate with isolated IPv6 networks across the existing IPv4 infrastructurE. There are currently fiv e IPv6 overlay tunnel types. Which three IPv6 overlay tunnel statements are true？（）
A . Overlay tunnels can only be configured between border routers capable of supporting IPv4 and IPv6.
B . An manual overlay tunnel supports point - to - multipo int tunnels capable of carrying IPv6 and Connectionless Network Service (CLNS) packets.
C . Overlay tunneling encapsulates IPv6 packets in IPv4 packets for delivery across an IPv4 infrastructure.
D . Overlay tunnels can be configured between border route rs or between a border router and a host capable of supporting IPv4 and IPv6.
E . Cisco IOS supports manual, generic routing encapsulation (GRE), IPv4 - compatible, 6to4, and Intra - Site Automatic Tunnel Addressing Protocol (ISATAP) overlay tunneling mechan isms.
F . Cisco IOS supports manual, generic routing encapsulation (GRE), IPv6 - compatible, 4to6, and Multiprotocol Label Switching (MPLS) overlay tunneling mechanisms.
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原文:穿山而建的铁路隧道长达数英里。译文:Railroad tunnels which are miles long built through mountains.
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原文:穿山而建的铁路隧道长达数英里。译文:Railroad tunnels which are miles long built through mountains.
